Steam and air heater



April 7, 1925.

1,532,506 D. MCGREG OR STEAM AND AIR HEATER Filed June 16. 1923 INVENTOR .PONHLZDJQ Q 6/8560? Z 'ATTORNEY Application filed June 15,

T all whom it may concern:

Be it known that I DONALD McGnneon, a citizen of the United States, and a resident of Tacoma, Pierce County, l Vashington, have invented certain new and useful Improvements in Steam and Air l-lcaters or" which the following is a specification.

l his invention relates to improvements in heaters and more particularly to steam and air heaters of that character adapted for heating purposes. It is the principal object of the invention to provide a combina: tion steam and hot air heating plant of economical and durable construction which can be quickly heated to produce steam or hot water for heating or other purposes, and which also provides for the heating of air which may be conducted through pipes in the usual manner to the different rooms of a building for heating or for otheruses.

-Other objects of the invention reside in the various details of construction and combination of parts embodied by the inven tion.

In accomplishing these and other objects I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein Figure, 1 is a transverse sectional view of a boiler constructed in accordance with the present invention, showing its steam pipe connection with a radiator and a hot air pipe connection with a floor register.

Figure 2 is a side view of the boiler with parts broken away for better illustration.

Referring more in detail to the drawings 1 designates a horizontal boiler beneath which is formed a tire box 3, all of which is supported by a rectangular channel beam frame 4.- which serves as a supporting base and also as the ash receiver. lhe lire box is equipped at the front with a door 5 and the base portion with a door 6. Toward the front portion of the fire box are located the usual grate bars 7 and back of these is a transverse bridge wall 8 which extends to about one-half the height of the box. The tire box is shorter in length. than the boiler and at its rearward end opens into a combustion chamber 10 that extends upwardly well within the outlines of the boiler portion so that the front wall 11 of this chamber about the tire box serves as a flue sheet, as is best illustrated in Figure 1. The

raises arena" caries.

1923. Serial No. 645,764.

boiler is of cylindrical form and its side walls are formed from a single piece of sheet metal that is rolled at its central portion into cylindrical form with opposite end portions bent outwardly and downwardly to form the outer opposite side walls that inclose the firebox. An arched crown sheet 12 forms the interior walls of the the box and this is spaced from the outer side walls and connects at its rearward end of the front wall 11 ofthe combustion chamber.

The construction provides a water arch 1 L at opposite sides and across the top of the tire box throughout its length that connects with the boiler through a narrow passage 15 that extends the length of the firebox. ,A plate 16 forms the rear end wall of the boiler and this is spaced slightly from the, rear wall 17 of the combustion chamber providing a narrow wall leg 18 which opens at its upper end into the boiler. (h 2 spaced irorn the front end of the boiler is a flue sheet 20-torming a smokechamber 21 and at the rear end of the boiler is'a smoke box 22 having an opening 23 for connection with a stack. Extending between the front wall 11 of the combustion chamber and the flue sheet 20 are tubes 24- and above these extending between the smoke chamber 21 and box 22 are tubes 26. This construction provides for passage or" smoke and heated air from the combustion upwardly and forwardly through the lower set of tubes and then rearwardly through the upper set thereby giving a maximum travel for ethciency.

To insure rigidity and durability of constructionand to provide for a passage of air from one side of the boiler to the other, I have tied the opposite walls together by means of a plurality of tubes 31 that are extended through the passage 15 that connects the water arch with the boiler. A water inlet connection 38 connected with the water arch 1d at one side of the fire box and an outlet pipe 39 leads from the upper central portion of the boiler. The pipe 39 may be connected with radiators in the usual manner as is illustrated in Figure 1 by means of a pipe 4:0 that leads to the radiator tl and in this way the boiler will serve the steam heating purpose. The particular cylindrical shape of the boiler and upper portion of the fire box provides large intermediate air pockets at opposite sides and I have extended-cover plates 36 over these pockets air I provide an air'inlet opening or pipe li'i leading through a wall 36 into the lower portion of a pocket 352m one-side of the furnace and have provided an outlet pipe 44 leading upwardly from the other air pocket at the opposite side of the furnace. This construction providesthathn may be inta-ken through pipe 453 heated within-the first a-ir' pooket'35 passed through tubes 31 into the other air pocket where it is heated to greater extent and deli'i' ered into the pipe 4:4.

'Having; thus described my invention, what It claim as new therein and desire to seeurewby Letters-Patent, is:

1. ln-a'heaterof' the character described, a water arch forming the side-and top walls for a fire box, acyl indrieal boiler superimposed longitudinally upon and"havin g water circulating connection with the water archa-nd with air pockets along opposite sides thereof, and a plurality ofa irpassages eonnesting the pockets, housing plates secured to the boiler and arch to inclose said pockets, a cold a-ir'inlet into on'e of said pockets'a'nd' an outlet pipe: from'tl're other. 7

2. A heater of the character described, comprisinga fire box, a waterareh overlying the ire box,a= boiler superimposed above the said water arch and communicating with the latter through a narrow, longitudinally extendingpassa-ge along the base of the boiler; said boiler and arch forming air pockets along opposite sides thereof, housing members secured to the boiler and arch to inclose said pockets, a plurality of air tubes connecting the pockets through the boiler and arch connecting passage, a cold air inlet into one ofsa-id pockets and an air outlet pipe leading from the other.

Inaheater of the character described, a-water arch,- a steam boiler supported longitudinally on said wa ter-arch having its side walls formed from aconti-nuou's piece of sheet metal shaped to form the boiler and the outer opposite side walls of the water arch-and to provide aural-rowlongitudinally extending eormnunicating passage between thearclrand boiler and providing a-ir poohets opposite sides between the arch and boiler, a plurality of air tubes connecting tlie sa id pockets through the W communicating passage between the arch: andboiler, housin members inolosing the pockets, a cold ai inlet intoone of said pockets and an outlct pipeleading fronithe other poclretr Signed at Portland, Multnomah Qoruit y", Oregon, this first day of June 1823.

DONALD idoGREGOR. 

